phy: rockchip: add usbdp combo phy driver

This adds a new USBDP combo PHY with Samsung IP block driver.
The PHY is a combo between USB 3.0 and DisplayPort alt mode.

Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
[eugen.hristev@collabora.com: ported to 2023.07, clean-up]
Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
4 files changed